Orthodontic appliance



FIG. 1 is a perspective view of an orthodontic appliance, showing my newdesign;

FIG. 2 is a right side elevational view thereof, with the left sidebeing substantially a mirror image;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan thereof;

FIG. 5 is a front elevational view thereof; and

FIG. 6 is a rear elevational view thereof.

The ornamental design for an orthodontic appliance, as shown anddescribed.